TDA9110 Datasheet, PDF (20/29 Pages) STMicroelectronics – LOW-COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS

TDA9110
OPERATING DESCRIPTION (continued)
Figure 17
Horizontal Flyback
Internal Trigged
Horizontal Flyback
Horizontal Focus
Cap Sawtooth
Horizontal Dynamic
Focus Parabola
Output
860ns
400ns
Moire Output
4.7V
2V
2V
II.7 - Moire Output
The moire output is intented to correct a beat
between the horizontal video pixel period and the
current CRT pixel width.
The moire signal is a combination of the Horizontal
and the Vertical frequency signals.
To achieve a moire cancellation, the moire output
has to be connected to any point of the chassis
controlling the horizontal position. We recommend
to introduce this “ Horizontal Controlled Jitter” on
the relative ground of PLL2 capacitor where this
“controlled jitter” frequency type will directly affect
the horizontal position.
The amplitude of the signal is I²C adjustable.
If the H-Moire feature is not necessary in the appli-
cation, the H-Moire output (Pin 3) can be used as
a 5 bits DAC output (0.3V to 2.2V). If the H-Moire
output is not used at all, so the Pin 3 must be either
kept to high impedance or grounded via a resistor.
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